水分对侧柏林地土壤温室气体排放的影响  

Influences of Moisture Content on Greenhouse Gases Emission from Platycladus Orientalis Woodland Soil

作　　者：孙晓涵[1,2] 贺康宁[1] 刘硕[2] 李玉娥[2] 万运帆[2] 郭倩倩[1] 李安超[1] 董梅[1] 

机构地区：[1]北京林业大学水土保持与荒漠化防治重点实验室,北京100083 [2]中国农业科学院农业环境与可持续发展研究所,北京100081

出　　处：《湖南农业科学》2011年第7期139-142,共4页Hunan Agricultural Sciences

基　　金：973计划项目关于"土地利用;土地利用变化和林业谈判问题研究"(2010CB955702);973计划项目"中国陆地生态系统碳氮水通量的时空格局及其区域响应研究"(2010CB833504)

摘　　要：以侧柏林地原状土壤为试验材料,利用人工气候箱(TPG-1260-TH)培养,研究不同土壤水分含量(最大田间持水量的20%、40%、60%、80%)对侧柏林地土壤CO2、N2O、CH4 3种温室气体排放通量的影响。结果表明:土壤水分含量为60%时,侧柏林地土壤CO2排放通量最大,平均排放通量为96.351 mg/m2h;土壤水分含量为80%时,侧柏林地土壤N2O排放通量最大,平均排放通量为0.021 mg/m2h;土壤水分含量为40%时,侧柏林地土壤CH4吸收通量最大,平均吸收通量为0.038 mg/m2h。The undisturbed soil of Platycladus orientalis woodland was cultivated in artificial climate incubator（TPG-1260-TH） to study the influences of different soil moisture contents（20%,40%,60% and 80% of the maximum field capacity） on emission fluxes of three greenhouse gases（CO2,N2O and CH4） from Platycladus orientalis woodland soil.The results showed that when moisture content was 60%,the CO2 emission flux was the highest,and the average CO2 emission flux was 96.351 mg/m^2h;when moisture content was 80%,the N2O emission flux was the highest,and the average N2O emission flux was 0.021 mg/m^2h;when moisture content was 40%,the CH4 absorption flux was the highest,and the average CH4 absorption flux was 0.038 mg/m^2h.

关 键 词：侧柏 土壤水分 温室气体排放 

分 类 号：S718.512[农业科学—林学]